著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Sang-Ho Lee and Chul-Hi Park,Environmental regulations in private and mixed duopolies: Taxes on emissions versus green R&D subsidies,Economic Systems,0939-3625,Elsevier BV,2021-03,45,1,100852,https://cir.nii.ac.jp/crid/1360298763434352640,https://doi.org/10.1016/j.ecosys.2020.100852